html {
  height: 100vh;
}

body {
  margin: 0;
  height: 100%;
  overflow: hidden;
}

#app {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}
/*滚动条相关*/

::-webkit-scrollbar {
  width: 4px;
  height: 4px;
}

::-webkit-scrollbar-track {
  background: #ffffff;
}

::-webkit-scrollbar-thumb {
  background: #4b5cc4;
}